Problema Solution
y varies jointly as a and b and inversely as the square root of c.
y=15
when
a=5,
b=5,
and
c=25.
Find y when
a=4,
b=3,
and c=4.
Answer provided by our tutors
y varies jointly as a and b and inversely as the square root of c means:
y = k*(ab/sq.root c)
where k is constant.
y = 15 when a = 5, b = 5, c = 25
15 = k*(5*5/sq.root 25)
15 =k*(5*5/5)
5k = 15
k = 15/5
k = 3
when
a = 4
b = 3
c = 4
y = 3*(4*3/sq.root4)
y = 3(4*3/2)
y = 18